This content is located in CAPS under Network Technologies: Networks for Grade 11.

When teaching “Local Area Networks (LAN and WLAN)” to Grade 11 learners, the goal is to connect theoretical understanding to everyday applications, helping students see how networks facilitate modern communication, data sharing, and secure access. This topic introduces learners to the key definitions, purposes, roles, uses, advantages, disadvantages, limitations, and the concept of Virtual Private Networks (VPNs).

A local area network (LAN) is a network of connected devices within a limited geographical area, such as a home, school, or office, while a wireless LAN (WLAN) achieves this connection without cables, using Wi-Fi technology.

To contextualise:

Definitions and Purposes

• LAN: Used for sharing resources such as printers, software, or data within a limited area.
• WLAN: Enables wireless connections to a LAN, allowing for mobility and easier device integration.
• VPN: Creates a secure and private connection over a public network, commonly used for remote work or safeguarding sensitive data.

Roles and Uses

• LANs enable collaboration by allowing multiple users to access shared files or applications.
• WLANs are ideal for flexible working arrangements where mobility is necessary, such as in schools with laptops or tablets.
• VPNs enhance privacy and secure communication, especially when accessing sensitive systems or public Wi-Fi networks.

Advantages, Disadvantages, and Limitations

• Advantages of LANs:
  • Speed: Fast data transfer within the network.
  • Cost-effective: Reduces costs through resource sharing.
  • Centralised management: Easier monitoring and troubleshooting.
• Disadvantages of LANs:
  • Limited range: Restricted to a small area.
  • Dependency: Relies on hardware like switches and routers.
• Advantages of WLANs:
  • Flexibility: Connect devices wirelessly.
  • Scalability: Easily expand the network by adding devices.
• Disadvantages of WLANs:
  • Security risks: More prone to breaches without strong encryption.
  • Signal interference: Obstacles or other networks can degrade performance.
• VPN Considerations:
  • Advantage: Ensures privacy and secure communication.
  • Disadvantage: Can reduce speed due to encryption and routing.

Engaging Classroom Activities

1. Network Building Simulation:
   • Use simple props like ropes (for cables), paper (devices), and labels (servers, routers).
   • Simulate LANs and WLANs by physically arranging the classroom to show wired and wireless connections.
   • Discuss the equipment needed for each (e.g., routers for WLANs).
2. Practical WLAN Setup:
   • If equipment allows, demonstrate setting up a basic wireless network using a router and a few devices.
   • Teach students how to connect, configure security settings, and explore the range of the WLAN.
3. VPN Demonstration:
   • Use free VPN software to show how connections work.
   • Access a public Wi-Fi network and demonstrate the secure tunneling effect of a VPN.
4. LAN vs. WLAN Debate:
   • Divide the class into two groups. One supports LAN and the other WLAN.
   • Encourage students to research and present their points about which network type is more advantageous in various scenarios.
5. Security Scenarios:
   • Pose hypothetical situations where students must decide whether to use a LAN, WLAN, or VPN. For instance, accessing confidential data in a coffee shop.

Bloom’s Taxonomy Integration

• Remembering: Define LAN, WLAN, and VPN.
• Understanding: Explain the differences between LAN and WLAN.
• Applying: Set up a simulated LAN in the classroom.
• Analysing: Compare the security aspects of WLAN and VPN.
• Evaluating: Debate the best type of network for specific use cases.
• Creating: Design a layout for a school LAN or WLAN.

Encourage learners to discuss how these networks impact their daily lives, such as connecting to Wi-Fi at home or school. Highlight VPNs as essential tools for cybersecurity, emphasising their role in safeguarding personal and institutional information.